1213344513 has 12 divisors (see below), whose sum is σ = 1763773908. Its totient is φ = 803743200.

The previous prime is 1213344511. The next prime is 1213344523. The reversal of 1213344513 is 3154433121.

It is a happy number.

1213344513 is a `hidden beast` number, since 1 + 213 + 3 + 445 + 1 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 895685184 + 317659329 = 29928^2 + 17823^2 .

It is not a de Polignac number, because 1213344513 - 2¹ = 1213344511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1213344511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 427938 + ... + 430763.

It is an arithmetic number, because the mean of its divisors is an integer number (146981159).

Almost surely, 2^1213344513 is an apocalyptic number.

It is an amenable number.

1213344513 is a deficient number, since it is larger than the sum of its proper divisors (550429395).

1213344513 is a wasteful number, since it uses less digits than its factorization.

1213344513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 858864 (or 858861 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 1213344513 is about 34833.0950821198. The cubic root of 1213344513 is about 1066.5831298620.

Adding to 1213344513 its reverse (3154433121), we get a palindrome (4367777634).

The spelling of 1213344513 in words is "one billion, two hundred thirteen million, three hundred forty-four thousand, five hundred thirteen".